Interlocking mechanism for elevators.



L s. MUCKLE & T. H. STRALEY.

INTEBLOCKING MECHANISM FOR ELEVATORS.

APPLICATION FILEDY NOV. 25. 1913.

,222,4%, Patented Aux-10, 1917.

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STJRALJEY, O15 PHILADELPI-ll'ih, 1E:Ellll'WSTllLiTlthTlIit, ASSIGNORS TSTANDARD ELEVATOR INTERLOCK C'OMPANY, 015. P1

.iADELPHIA,

PENNSYLVANIA, A CQBPOEATION 0F PEIllllSYIPU'AIT-TIA.

INTERLDCKING MECHANISM FOR A'IORS.

Specification of Letters Patent.

Application filed November 25, 1912 Serial No. $053,958.

To all wbomz't may) concern:

Be it Known that we, JOHN S. MUGKIJ': and THOMAS H. STRALEY, citizens ofthe United States, residing in Philadelphia,

county of Philadelphia, State of Pennsyl-' Vania, have invented certainImprovements in Interlocking Mechanism for Elevators, of which thefollowing is a specification.

The object of our invention is to simplify the construction of the meansfor operating the electromechanical or mechanical interlocking means forelevator-st -This type of mechanism prevents the door at a landing frombeing opened when a car is not at a landing and prevents a car frombeing oper ated after itcomes to a stand opposite the landing when thedoor is opened and the mechanism cannot be operated until the door isclosed.

In the accompanying drawings:

Figure 1 is a rear view of the operating stand, which is located withinthe car, the parts being in position at rest when the'car is stationaryand at a landing. This view also illustrates the landing door open andthe mechanism locked;

Fig. 2 is a view similar to the upper portion of Fig. 1, showing theparts in position when the car is ascending; and

Fig. 3 is a view similar to Fin. 1 with the parts in position when thecar is descending.

Ne have illustrated in diagram a part of the landing and the floor of anelevator car showing a type of mechanism at the landing and onthe carsuch as illustrated in the patent of John S. Muckle, No. 583,331, of1897, although it will he understood that any of the well knownmechanisms of this type may he used without departing from the essentialfeatures of the invention.

Referring to the drawings, 1, 1, in. the present instance-are twostandards mounted on the floor of a car 24: and these standards carry aframe 2 having a segment 3 with end and central stops, as shown. 4 is alever pivoted at 5 to the frame 2. On this lever is a toothed segment 6.The teeth or. this ment mesh with teeth of a pinion 7 which is geared tothe mechanism fox-controlling the movement of the elevator. 8 is a,shaft mounted in a hearing 9 depending from the one arm of which isconnected loya rod 1% to the interlocking mechanism on. the car. Theother arm of the lever 13 has a depressed portionglo and is flared ateach side of this depressed portion, forming; bearings 16 and '17. thepivot 5 and has a roller 18 which rests in a depressed portion of thelever, when the lever is in the central position, Fig. 1. Theinterlocking mechanism is that shown and (lQSClilX-Xl in the patentgranted to John Muckl, No. 583,331 oi .llday E28, 1897, and consists ofa plunger connected hy a rod on to a bell crank lever 27' which isattached to the rod 14-. This plunger has a flange 28 which is engagedby a weighted locking device 29 which is held out of action by aprojection on the door 30 at the platform which is at the landing 31. a.roller on the plunger press a spring latch 33 when the plunger isprojected so to release the door. ll hen the lever 4- is in. theposition illustrated in 1 it is looked as soon the door is opened, astheinching device 29 is released and engages the'projecting plnngcr 25. llhen the door is closed, the locking device 29 is -forced to disengagethe plunger, after which the lever lcan he turned either to the positionshown in Fig. 2 to cause the car to ascend or to that shown in Fig. 3 tocause the car to descend and the lever 13 will he moved to retract theplunger 25, releasing the latch so that it will lock the door 30. inorder to stop the car, the lever is moved to the central position, Fig.1, the plunger projected and as it comes to a stop it will press thelatch As soon as the door is opened the lock 29 will he released andwill a gain look the lever 4 and the intervening mechanism.

\Ve claim:

1. The combination in an operating device for elevator interlocking;mechanism. of a stand; an operating: lever pivoted to the stand andconnected to the means for stoppin g and starting the elevator car, saidoperatingr lever having an extension; a lever also pivoted to the stand;and a. rod connected to one arm of said lever and extending to theinterlocking mechanism of the car, the other arm of the lever havingdepression for the reception of the extension of the operating lever,the two levers being so arranged in re speet to each other that when theoperating ill lever is in the central position the extension is in thedepression of the other lever and when the operating lever is moved toeither side of the center it will depress the arm of the lever, which isconnected to the interlocking mechanism.

2. The combination in an operating device for elevator interlockingmechanism, of a car; a stand mounted thereon; an operating lever pivotedto the stand and arranged to assume either a central position or aposition at either side of thecenter, said lever being connected to themeans for stopping and starting a car and having an extension beyond itspivot; a roller on the extension; a lever pivoted to the stand; a rodconnected to one arm of the lever and to the interlocking mechanism ofthe elevator, the other arm having a depression and having a bearing oneach side of the depression so that when the operating lever is in thecentral position it is located in the depression and when the operatinglever is moved to either side of the center the roller Will'assume aposition on either one of the bearings and will depress said arm of theinterlocking lever.

In testimony whereof, we have signed our names to this specification, inthe presence of two subscribing Witnesses.

JOHN s. MUCKLE. THOMAS H. 'STRALEY.

Witnesses:

Jos. H. KL IN, WM. A. BARR.

